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@ARTICLE{Fischer:902341,
author = {Fischer, Liudmila and Neuhaus, Kerstin and Schmidt,
Christina and Ran, Ke and Behr, Patrick and Baumann, Stefan
and Mayer, Joachim and Meulenberg, Wilhelm A.},
title = {{P}hase formation and performance of solid state reactive
sintered {C}e 0.8 {G}d 0.2 {O} 2− δ –{F}e{C}o 2 {O} 4
composites},
journal = {Journal of materials chemistry / A},
volume = {10},
issn = {2050-7496},
address = {London [u.a.]},
publisher = {RSC},
reportid = {FZJ-2021-04190},
pages = {2412-2420},
year = {2022},
abstract = {Reactive sintering of dual phase composites for use as
oxygen transport membranes is a promising method enabling
lower sintering temperatures as well as low-cost raw
materials. Ce0.8Gd0.2O2−δ–FeCo2O4 composites with
different nominal weight ratios from 60 : 40 to
90 : 10 are processed by reactive sintering of
commercial Ce0.8Gd0.2O2−δ, Fe2O3, and Co3O4 powders. The
phases formed in situ during sintering are investigated
qualitatively and quantitatively by means of XRD and
Rietveld refinement as well as transmission electron
microscopy. Besides gadolinia-doped ceria, two Fe/Co-spinel
phases are in equilibrium in agreement with the phase
diagram. Moreover, a donor-doped GdFeO3-based perovskite
(Gd,Ce)(Fe,Co)O3 showing electronic conductivity is formed.
Due to these intense phase reactions, the composition of
each individual phase is assessed for all composites and
their functional properties are discussed. The oxygen
permeation performances of the composites are measured
including their dependence on temperature and the potential
limiting steps are discussed. The results reveal that the
phase reactions support the formation of the desired mixed
ionic electronic conductivity achieving percolation at low
nominal spinel contents. The specific microstructure plays
an extremely important role in the membrane performance and,
thus, special attention should be paid to this in future
research about dual phase membranes.},
cin = {IEK-1 / IEK-12 / ER-C-2},
ddc = {530},
cid = {I:(DE-Juel1)IEK-1-20101013 / I:(DE-Juel1)IEK-12-20141217 /
I:(DE-Juel1)ER-C-2-20170209},
pnm = {1232 - Power-based Fuels and Chemicals (POF4-123) / 5353 -
Understanding the Structural and Functional Behavior of
Solid State Systems (POF4-535) / DFG project 387282673 - Die
Rolle von Grenzflächen in mehrphasigen Ceroxid-basierten
Membranen für den Einsatz in Membranreaktoren},
pid = {G:(DE-HGF)POF4-1232 / G:(DE-HGF)POF4-5353 /
G:(GEPRIS)387282673},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000712912400001},
doi = {10.1039/D1TA05695F},
url = {https://juser.fz-juelich.de/record/902341},
}